powerpc: wii: platform support
Add platform support for the Nintendo Wii video game console. Signed-off-by: Albert Herranz <albert_herranz@yahoo.es> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Albert Herranz
Grant Likely
parent
9c21025c78
commit
5a7ee3198d
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@ -115,3 +115,11 @@ config GAMECUBE
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Select GAMECUBE if configuring for the Nintendo GameCube.
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More information at: <http://gc-linux.sourceforge.net/>
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config WII
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bool "Nintendo-Wii"
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depends on EMBEDDED6xx
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select GAMECUBE_COMMON
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help
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Select WII if configuring for the Nintendo Wii.
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More information at: <http://gc-linux.sourceforge.net/>
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@ -10,4 +10,4 @@ obj-$(CONFIG_PPC_C2K) += c2k.o
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obj-$(CONFIG_USBGECKO_UDBG) += usbgecko_udbg.o
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obj-$(CONFIG_GAMECUBE_COMMON) += flipper-pic.o
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obj-$(CONFIG_GAMECUBE) += gamecube.o
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obj-$(CONFIG_WII) += hlwd-pic.o
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obj-$(CONFIG_WII) += wii.o hlwd-pic.o
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202
arch/powerpc/platforms/embedded6xx/wii.c
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202
arch/powerpc/platforms/embedded6xx/wii.c
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@ -0,0 +1,202 @@
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/*
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* arch/powerpc/platforms/embedded6xx/wii.c
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*
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* Nintendo Wii board-specific support
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* Copyright (C) 2008-2009 The GameCube Linux Team
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* Copyright (C) 2008,2009 Albert Herranz
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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*/
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#define DRV_MODULE_NAME "wii"
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#define pr_fmt(fmt) DRV_MODULE_NAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <linux/seq_file.h>
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#include <linux/kexec.h>
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#include <linux/of_platform.h>
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#include <asm/io.h>
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#include <asm/machdep.h>
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#include <asm/prom.h>
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#include <asm/time.h>
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#include <asm/udbg.h>
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#include "flipper-pic.h"
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#include "hlwd-pic.h"
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#include "usbgecko_udbg.h"
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/* control block */
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#define HW_CTRL_COMPATIBLE "nintendo,hollywood-control"
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#define HW_CTRL_RESETS 0x94
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#define HW_CTRL_RESETS_SYS (1<<0)
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/* gpio */
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#define HW_GPIO_COMPATIBLE "nintendo,hollywood-gpio"
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#define HW_GPIO_BASE(idx) (idx * 0x20)
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#define HW_GPIO_OUT(idx) (HW_GPIO_BASE(idx) + 0)
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#define HW_GPIO_DIR(idx) (HW_GPIO_BASE(idx) + 4)
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#define HW_GPIO_SHUTDOWN (1<<1)
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#define HW_GPIO_SLOT_LED (1<<5)
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#define HW_GPIO_SENSOR_BAR (1<<8)
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static void __iomem *hw_ctrl;
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static void __iomem *hw_gpio;
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static void wii_spin(void)
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{
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local_irq_disable();
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for (;;)
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cpu_relax();
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}
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static void __iomem *wii_ioremap_hw_regs(char *name, char *compatible)
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{
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void __iomem *hw_regs = NULL;
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struct device_node *np;
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struct resource res;
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int error = -ENODEV;
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np = of_find_compatible_node(NULL, NULL, compatible);
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if (!np) {
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pr_err("no compatible node found for %s\n", compatible);
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goto out;
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}
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error = of_address_to_resource(np, 0, &res);
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if (error) {
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pr_err("no valid reg found for %s\n", np->name);
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goto out_put;
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}
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hw_regs = ioremap(res.start, resource_size(&res));
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if (hw_regs) {
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pr_info("%s at 0x%08x mapped to 0x%p\n", name,
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res.start, hw_regs);
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}
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out_put:
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of_node_put(np);
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out:
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return hw_regs;
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}
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static void __init wii_setup_arch(void)
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{
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hw_ctrl = wii_ioremap_hw_regs("hw_ctrl", HW_CTRL_COMPATIBLE);
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hw_gpio = wii_ioremap_hw_regs("hw_gpio", HW_GPIO_COMPATIBLE);
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if (hw_gpio) {
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/* turn off the front blue led and IR light */
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clrbits32(hw_gpio + HW_GPIO_OUT(0),
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HW_GPIO_SLOT_LED | HW_GPIO_SENSOR_BAR);
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}
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}
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static void wii_restart(char *cmd)
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{
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local_irq_disable();
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if (hw_ctrl) {
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/* clear the system reset pin to cause a reset */
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clrbits32(hw_ctrl + HW_CTRL_RESETS, HW_CTRL_RESETS_SYS);
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}
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wii_spin();
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}
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static void wii_power_off(void)
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{
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local_irq_disable();
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if (hw_gpio) {
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/* make sure that the poweroff GPIO is configured as output */
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setbits32(hw_gpio + HW_GPIO_DIR(1), HW_GPIO_SHUTDOWN);
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/* drive the poweroff GPIO high */
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setbits32(hw_gpio + HW_GPIO_OUT(1), HW_GPIO_SHUTDOWN);
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}
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wii_spin();
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}
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static void wii_halt(void)
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{
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if (ppc_md.restart)
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ppc_md.restart(NULL);
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wii_spin();
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}
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static void __init wii_init_early(void)
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{
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ug_udbg_init();
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}
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static void __init wii_pic_probe(void)
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{
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flipper_pic_probe();
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hlwd_pic_probe();
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}
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static int __init wii_probe(void)
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{
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unsigned long dt_root;
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dt_root = of_get_flat_dt_root();
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if (!of_flat_dt_is_compatible(dt_root, "nintendo,wii"))
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return 0;
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return 1;
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}
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static void wii_shutdown(void)
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{
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hlwd_quiesce();
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flipper_quiesce();
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}
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#ifdef CONFIG_KEXEC
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static int wii_machine_kexec_prepare(struct kimage *image)
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{
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return 0;
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}
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#endif /* CONFIG_KEXEC */
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define_machine(wii) {
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.name = "wii",
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.probe = wii_probe,
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.init_early = wii_init_early,
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.setup_arch = wii_setup_arch,
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.restart = wii_restart,
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.power_off = wii_power_off,
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.halt = wii_halt,
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.init_IRQ = wii_pic_probe,
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.get_irq = flipper_pic_get_irq,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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.machine_shutdown = wii_shutdown,
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#ifdef CONFIG_KEXEC
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.machine_kexec_prepare = wii_machine_kexec_prepare,
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#endif
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};
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static struct of_device_id wii_of_bus[] = {
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{ .compatible = "nintendo,hollywood", },
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{ },
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};
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static int __init wii_device_probe(void)
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{
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if (!machine_is(wii))
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return 0;
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of_platform_bus_probe(NULL, wii_of_bus, NULL);
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return 0;
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}
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device_initcall(wii_device_probe);
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